Departamento de Engenharia Hidráulica e Ambiental (PHA), Escola Politécnica (EP), Universidade de São Paulo (USP), Avenida Prof. Almeida Prado, 83 Trav. 2, Cidade Universitária, CEP: 05508-900, São Paulo, SP, Brazil.
J Environ Manage. 2020 Feb 15;256:109947. doi: 10.1016/j.jenvman.2019.109947. Epub 2019 Dec 16.
In this research, ammonia evaporation capacity under atmospheric and vacuum pressure conditions, as well as distillation capacity of different concentrations of landfill leachates, were evaluated. Simple evaporation and vacuum pressure evaporation tests showed high NH-N removal efficiencies, ranging from 95% to 98% for raw landfill leachates, indicating that vacuum pressure would not be necessary during ammonia removal and recovery processes when applying temperature of 300 °C. Distillations tests also showed the promising NH-N recovery potential in ultra-concentrated leachates (over 100 gNH-N/L) in the order of 91%-94% in few minutes, evaporating a small portion of landfill leachate. The results presented encourages the recovery of ammonia from landfill leachate and its industrial and agricultural, highlighting its feasibility as well as simultaneously preventing the ammonia release to water bodies or the atmosphere.
在这项研究中，评估了在大气和真空压力条件下氨的蒸发能力，以及不同浓度的垃圾渗滤液的蒸馏能力。简单的蒸发和真空压力蒸发试验表明，原始垃圾渗滤液的 NH-N 去除效率很高，范围在 95%到 98%之间，这表明在应用 300°C 的温度时，在氨去除和回收过程中不需要真空压力。蒸馏试验还表明，在数分钟内，通过蒸发一小部分垃圾渗滤液，可以从超高浓度的垃圾渗滤液（超过 100 gNH-N/L）中获得有希望的 NH-N 回收潜力，回收率在 91%-94%之间。研究结果鼓励从垃圾渗滤液中回收氨，并将其应用于工业和农业，突出了其可行性，同时防止氨释放到水体或大气中。
